Sync two computers one db

Hi, I’m using the FF extension running with keepass on two computers … both using the same db. I have experienced a couple of times that I lose changes … and I have not figured out yet why this is the case. Kee RPC informs me about the inconsistenccy and I generally select “synchronize” … but this may be the problem … don’t know. Is there any good resource for tipps on how to use one db with two computers?